The link to buy: https://www.aliexpress.com/store/product/Titan-Aero-V6-hotend-extruder-full-kit-free-shipping/1654223_32815903993.html?spm=2114.12010608.0.0.ZSyEKC
The link to buy2: https://www.aliexpress.com/store/product/1-75-3mm-aluminum-Titan-Aero-extruder-Upgrade-Kit-12V-24V-fan-Free-shipping/1654223_32813258244.html?spm=2114.12010608.0.0.Uv100s
Trianglelab store :https://www.aliexpress.com/store/1654223